body {
  background-color: lightblue;
  font-size: 20px;
}

#app {
  color: tomato;
}

#content {
  border: 1px solid red;
}

#content article .title {
  font-size: 20px;
  color: red;
}

#content article .title:hover {
  color: yellow;
}

nav {
  background-color: #fff;
}

.footer {
  background-color: gray;
  padding: 100px;
  text-align: center;
}
